Manual / Guide · 1968
BSP 551-147-210: 756A PBX, Method of Providing Service Options
Stations, trunks, dial-pulse register, night connections and power plant options of the 756A.
Manual / Guide · 1968
Stations, trunks, dial-pulse register, night connections and power plant options of the 756A.
",~ SYSTEM SECTION 551.147.2'10 Issue 3, August 1968 AT& TCo Standard PRACTICES , :". Series SERV;CE O?TiONS (STATIONS, TRUNKS, DIAL PULSE R~G~STER, CENTRAL OfFICE ALARM, NIGHT CONNECTIONS, REGISTEnS, POWER PLANT, eTC) METHOD Of PROVIDING 756A PBX :7 GENERAL 2. The' information in this section covers the r.lll~t generally used features and options ;;'ll!('ments information on circuit drawings. ~." diagrams (CAD) for the 756A PBX are ", ,j in SD-65746-01 and SD-66920-01. 2.01 This section is reissued to include option ;'.'~ ~('r codes and to revise information to ,,\·:th current drawing information. Since ~.·i~~ue covers a general revision, arrows ':~i!y used to indicate changes have been •• I ':3 • ~ • Class-of-service options that may be provided for stations are toll allowed, toll denied, restricted, and unassigned. Options are applied by placing or removing straps on the LINE terminal strips. (See Fig. 1 and 2 and Table B.) 2.02 3. INWARD RESTRICTION OF STATIONS The inward restriction circuit provides means whereby the attendant is prevented from completing central office class calls to a station. A maximum of ten stations can be inward restricted. 3.01 Features and options are provided, in most r;L"CS, by strapping at various terminal strips ~. ~h(' switching " CLASS OF SERVICE FOR STATIONS cabinet, When the attendant attempts to complete a call to an inward restricted station, the call is rerouted to the attendant by way of an attendant trunk. The attendant then operates the attendant trunk pickup key and hears a single spurt of tone, indicating that the call is intercepted and that the station is inward restricted. 3.02 .\"'1/(': Methods for applying the options are ""'d'red by text, tables, and figures which \.. ht'n required must be used together to ,;"\ermine the necessary procedure. Some ':!'ll\' the specific wiring that is furnished :l~.d gi\"e information for removing or adding ;,:rin~ to change a feature. Others are shown I' typical examples and a specific arrangement ".'N he determined locally to meet job ·")uirements. Table A lists the service options or features r"\'c-red in this section and cross references . "'l'.;ipment at which the options are applied. . :~ Wire wrapping and unwrapping tools supplied ',':i:h the PBX should be used for making , "';''l\'ing connections. The inward restriction feature is applied on an optional basis at terminal strips on the inward restriction unit. To inward restrict a station, add or remove connections as follows: 3.03 (a) At TS-C or TS-D, connect the station terminal to a nonconnected IR(A-J) terminal. (b) At TS-A, remove the strap between terminals S and SA of the station to be restricted . (c) Connect TS-A terminal S to terminal S on TS-B which corrc~poml,; to terminal IR(A-J) u~ed in (a). © American Tell'phone and Tl'Il'~r:qlh (',)1l11':1I1\', 1!I(;.-- I'rin('d in : '.~ ..\. Page 1 SECTION 551-147-210 TABLE A - ! OPTION OR FEATURE I Class of Service for PART NO. 2 ! Stations CROSS REFERENCE LINE, lIN!(, AND MAr!KER Cir-CUIT Table B; Fig. 1, 2 DIAL PULSE REGISTERS I I TIE OR CO TRUNKS ALARM '\'.~ R:G1S~~ f U~1T Table I "o , f or St .. · aclOns 4 p'19. 0, " 4• -;:> Hunting for Trunks 5 Fig. 6 Emergency CO Connections Single-Digit Dialing for Stations and Miscellaneous Trunks 6 7 Table F Table I; Fig. 7 Universal Line Circuits 8 Tables G, H; Fig. 8 Table I Dial Repeating Tie Trunks Central Office Trunks 9 Table E; Fig. 8 Table I 10 Table H Table I I"'T L' hunl,.l~lg -_. j - .. Busy Verification Attendant Trunks Ringdown Tie Trunks Indication of Camp-On Dial Pulse Registers Central Office Alarm Night Connections Trunk Answer From Any Station .- . 11 12 13 14 15 .- i Tables E, H; Fig. 9 t Table K Table C Table G Table I Table I Table I Fi~. ~ 16 _.- 17 .H 18 .. Traffic and Trouble Registers Power Plant 19 Fig'. 11\ i 11 .. 20 _. Conference Calling 21 Meet-Me Conference (A&M) Attendant Conference Code Call 22 TOUCH-TONE® Calling Recorded Telephone Dictation Pag-ing- .. 23 , 24 25 26 I .. I I --... I .. I j I I ," i .- - Pad Control 27 28 ! ." Station Message Register 2~ ! Page 2 -- ISS 3, SECTION 551-147-210 :~: ~\oI: :~ CAJ 16 CAD 3 (MOl OR CAD 35 0 0 0 0 0 HM 0 0 0 0 0 IT 0 0 0 0 0 H ~.~ ~ 0 0 S 0 SIA :J 0 0 0 0 C 8 0 0 0 CJ 0 0 0 0 H @ ~~ 0 CJ S 0 0 SI 0 0 0 TLA 0 0 0 ,CS) 0 0 0 TLD (44) LINE ~ ,'-J :; :l C :GOl ~i DIODE 0 ~ 0 (20) 0 0 0 TLA ~ 0 0 CS 0 0 TLD (24) LINE EXAMPLE: STATION 20 - RESTRICTE'D STATION 21 - TOLL ALLOWED STATION 22 - TOLL DENIED STATIONS 23 THROUGH 24 - UNASSIGNED. EXAMPLE STATION 40-RESTRICTED STATION 41- TOLL ALLOWED STATION 42 - TOLL DEN I ED STATIONS 43- 44-UNASSIGNED Fig. 1-Typical Class of Service Strapping on LINE Terminal Strip (Station Lines 40 Through 44) (50.65746, CAD 3 [MOl or CAD 35) (d) Connect TS-A terminal SA to terminal SA on TS-B which corresponds to terminal IR(A-J) used in (a). 4. HUNTING FOR STATIONS Fig. 2-Typical Class of Service Strapping on LINE Terminal Strip (Station Lines 20 Through 24) (SD-65746, CAD 4 [MOl or CAD 16) of hunting will be in the direction of the arrow on the diode. (See Fig. 3 and 4.) To provide 2-way hunting, strap the H-terminals of stations in the tens group to be arranged for 2-way hunting. (See Fig. 3 and 4.03 4.) Station lines within each tens group may be arranged for one-way, 2·way, or combination 11lHltinl{. Hunting is arranged by connecting straps "r diodes between H- terminals on the LINE t"rminal strips. One LINE terminal strip and one ol!ode are provided with the PBX for each five ".:ltion lines. The diode for station lines 20 through ~ 1 and the diode for stations 25 through 29 are ;.hipped loose. Diodes provided for other stations :l"l' wired on the applicable LINE terminal strips. rr additional diodes are required to provide the ·h·sired hunting arrangement, the diodes must be ':l;lplied locally. 4.01 To provide one-way hunting, wire or insert a diode hetween each pair of H- terminals f'lr stations in the hunting chain. The direction 4.04 To provide combined one- and 2-way hunting, wire or insert diodes and install straps between H- terminals of stations in the tens group as required. (See Fig. 5.) 5. HUNTING FOR TRUNKS Trunk hunting is provided by strapping together the H terminals on the central office trunk hunting terminal strip (CO TRK HUi\T). The PBX is furnished with all ten H terminals of the central office trunks strapped together. 5.01 4.02 (a) If one hunting group of ten or less central office trunks is to be prodded using the Page 3 SECTION 551-147-210 TABLE B - CLASS-OF-SERVICE OPTIONS FOR STATION LINES (SD-65746-01, CAD 3 OR 35 AND 4 OR 16) STRAPS REOUIRED ON "LINE" TS (NOTE 11 OPTIONS NOTES Allowed CS to TLA S to Sl or S1A 2, 6 Denied 3, 6 Restricted CS to TLD S to S1 or S1A S to S1 or SlA 4, 6 Unassigned None 5 Toll Notes: 1. LINE terminal strips are located as follows: Lines 20 through 29, slide 2 mounting plate M. Lines 30 through 39, slide 2 mounting plate M. Lines 40 through 59, slide 3 mounting plate M. Lines 60 through 79, slide 4 mounting plate M. 2. The PBX is furnished with all lines strapped for toll allowed service, with access to all equipped trunks. 3. Toll denied service may be provided only where the central office is arranged for toll diverting. 4. Station lines are restricted from dial access to central office trunks when neither the CS to TLA or CS to TLD straps are provided. A restricted line can be connected to a central office trunk by the attendant. Restricted lines are either allowed or denied access to code 8 by strapping at the dial pulse register. (Refer to Table J.) When code 8 single-digit dialing is used to reach a toll operator via central office trunks, restricted lines are always denied access to these trunks. 5. Calls to unassigned lines are connected to an attendant trunk or busy-tone trunk. The S to S1 strap, if wired, must be removed. The CS to TLA strap, if wired, need not be removed unless associated with a universal line circuit. 6. Station lines 20 through 29 have SlA leads on the LINE terminal strips. All other station lines have S1 leads. single-digit code 9, the strapping as furnished should not be changed. the dial pulse register. C and D.) 6. (See Fig. 6 and Tab'" ::ME~GENCY CENTRAL OFFICE CONNECTiONS (b) If two or more hunting groups are to be provided, the strapping must be rearranged at the CO TRK HUNT terminal strip and in Page 4 6.01 The PBX is so arranged that in the ('\"., of a power failure, all relays in the \'i'\ ISS 3, SECT!ON 551-147-210 r~r~j~~:) '0 0"0 ~ 00'00 CAD 3 (MOl OR CAD 35 DIODE 0 0 0 0 0 HM 0 0 0 0 0 IT H 0 o @P'@ 0 ~~~~ 0 CAD" (MD) OR CAD 16 S 0 51 D' 0 0 0 0 TLA 0 0 0 0 0 CS 0 0 0 0 0 TLD (54) LINE S SIA 0 0 0 0 0 TLA 0 0 0 0 0 CS 0 0 0 0 0 TLD (24) LINE (20) (50) ~ H EXAMPLE: EXAMPLE STATION 51 HUNTS TO ST'.TION 54. STATIONS 51 AND 54 STRAPPED FOR ONE-DIRECTION HUNTING. STATIONS 52 AND 53 STRAPPED FOR TWO-DIRECTION HUNTING. Strapping on LINE Terminal Strip Showing Straps for Station Hunting (SD-65746, CAD 3 IMDj or CAD 35) STATIONS 20 ANO"24 STRAPPED FOR ONE-DIRECTION HUNTING. STATION 20 HUNTS TO STATION 24. STATIONS 22 AND 23 STRAPPED FOR TWODIRECTION HUNTING. Fig. 3- Typical Fig. 4-Typical Strapping on LINE Terminal Strip Showing Straps for Station Hunting (Station lines 20 Through 24) (SD-65746, CAD 4 IMDI or CAD 16) ·.·l(o:~~e and either three or four central office trunks :r" automatically transferred to stations. In a !'B\ equipped with flexible night connections, trunks Of. I. and 2 are connected to stations 30, 31, and off-hook until dial tone IS heard, and then the call is placed normally. ::~. In a PBX equipped with fixed night connections .:'rinr to list R or ~) of module 2), trunks 0, 1, 2, :,':,] ;) are connected to stations :W, :~l, :~2, and 33. 7. A start key (551A) is required to apply ground to the ring of the line at stations • ~;l! ar(~ arranged for automatic transfer to central '.':ipc trunks or for fixed night connections. SINGLE-DIGIT DIALING FOR STATIONS AND MISCelLANEOUS TRUNKS 6.02 Stnrt !«('f/ Connections: Extend an AP ground lead from the 75-pair terminal (module . ' !{J the station connecting block. Connect the \!' ~round to one side of the 551A key and the "'f.'r side to the tip of the line. (This is done to : ~"\'('nt inadvertent grounding of the ring side ,':il the receiver is off-hook.) 603 604 To originate a' central office call, the start key is pressed momentarily with the receiver Stations 20, 30, 40, 50, 60, and 70 may be arranged for single-digit access. With this arrangement, it will be necessary to dial only the first, or tens digit. to reach the stations. If the second, or units digit, does not follow within 3 seconds, the register will complete the call as if the units digit had been dialed. 7.01 ° If digit 8 is used for single-digit access to a long distance operator, digit 2 (for single-digit access) or station 20 may be assigned. If digit 8 is used for 2-digit access to a trunk. digit 2 (for single-digit access) or station 20 cannot be assigned. Central office trunks arranged for single-digit 8 access to a long distance operator 7.02 Page 5 SECTION 551-147-210 CAD 3 (MD) OR CAD 35 2 .--{' l'....:..- f :l~.::"'±-~ f:' ---::..~, ~l"o 0 ··0 ~ DIODE \:Y=.v~~ ~ ~ ~ ~ ~ ~~' t • 0 0 0 0 ~o ~ 0000'0 ~ t lo t ODD "'r" (40) 0 •• ' •• II 0 SI Tl.A CS TLD -LINE 21 5-Typical Strapping on LINE Terminal Strip Showing Combination Hunting (SO-65746, CAD 3 [MO] or CAD 35) must be in the same hunting group. Table E.) ,/ q \ V,) " ~ I ." r' 0 I' --\'\ I, , ;.. r·f· -\.-<l', '~-"f 90';'" 91 ,;' , ~' ~r 'J , 96 ',/,;!. '! 97 :' '; 198 r)' 92 3 93 "," 95 C:,: " L 94,r: (j 99 !J(\ ] 'wi II NOTE: THIS TERMINAL STRIP IS LOCATED AT SLIDE 4, POSITION Z, STATIONS 40,41,42,43, AND 44 STRAPPED FOR ONE AND TWO DIRECTION HUNTING. STATIONS 40,41,42 AND 43 ARE TWO DIRECTION AND CAN HUNT TO STATION 44 BUT STATIO"" 44 CANNOT HUNT TO STATIONS 40,41,42 AND 43, Fi~. CAD 7 CO TRK HUNT 0 n n S I (44) 0 0 H ' 0 18 0 o 0 000 , =.AnI -<= -<= 28 EXAMPLE: HUNTING ON TRUNK GROUP O,I,2,5,6,AND 7 HUNTING ON TRUNK GROUP 3,4,8, AND 9 Fig. 6-Typical Strapping on Central Office Trun" Hunting Terminal Strip Showing Strappin? for Trunk Hunting (SO-65746, CAD 7) (Refer to Additional equipment required for each station arranged for single-digit access consists of the' following: the tens group of the station to be arranged (,' single-digit dialing. (See Fig. 7.) 7.03 (a) Two J58829J. List 4 (KS-15724. List 2) diodes for installation in the dial pulse registers 0 and 1. (h) A 6017-8 key and a 15E-3 lamp indicator, or equivalent. for installation at the station when the station make-busy feature is to be provided. When operated, the key provides a visual busy indication and directs any incoming calls to intercept. 7.04 To arrange a Iftalion for single-digit accelfS, a diode must he connected in each dial pulse register as follows: At the right rear of each dial pulse register (slide 6. positions A through F) connect a KS-15724. List 2 diode between SDT terminal and the 8T(-) terminal corresponding to Page 6 7.05. When the station make-busy featllfe II prodded, remove strap S to Sl on Ll\' terminal strip for station arranged for sing!,,-;!" access. (Refer. to Table B.) Connections for the key and lamp associ a> with one of the six stations that may ;, used for single-digit access are shown in Tahir; 7 .06 8. UNIVERSAL LINE CIRCUITS A line circuit in the 20 through 29 ~r' may be used for connection to a station: . (20 throu"gh 29). dial repeating tie trunk, ,:' conference circuit. recorded telephone die!:l', . trunk, lomh::peakcr pagin~ trunk. auxiliary po~;: .. circuit. or either the callin~ or an~\\'ering end " : 3A code call circuit. When a univl'l'~al line cir,' , . is assigned to a station or the an~\\'ering end f.: • 3A code call circuit. it is reached by dialing:' corre~ponding number in the 20 through 2~) ~l'~;' S.Ol TABLE C - FEATURE 2-way If,·F/ :? 2-way Assigned Service Equipped for Night Connection With Cord Switchboard -One-way (Incoming) Unassigned - "U Q (0 III ~ STRAPS ON CENTRAL OFFICE TRUNK UNIT TERMINAL STRIP SLIDE 5 (SD-65746-01, CAD 61 OPTION CO Battery Voltage Central Office Trunks o through 9 CENTRAL OFFICE TRUNK OPTIONS REQUIRED FURNISHED S 16 to 26 16 to 26 39 Volts or Less 01' Panel CO R 26 to 27 Make-Busy and Busy Display Provided YP YQ 11 to 18 11 to 18 14 to 28 14 to 28 Make-Busy and Busy Display Not Provided J(MD) 18 to 28 YP 11 to 18 40 Volts 01' More YQ Make-Busy and Busy Display Provided I 11 to 18 14 to 28 ZQ(MD) - Make-Busy and Busy Display Not Provided f- TSIAI REMOVE STRAPS ON TRUNK CONN UNIT TERM. STRIP - - (50-65746-01 CAD 71 15181 -- Make-Busy and Busy Display Provided Make-Busy and Busy Display Not Provided REMOVE REQUIRED STRAPS ON SUPPLEMENTARY TRUNK UNIT J58829M LIST 5 (A & MI 14 to 28 --- 14 to 28 - 14 to 28 -- v; VI K 18 to 28 17 to 18 W VI ----- ~, K - r L '.1 0, i '" 1 eo:J IJ !< S "8 v; Iv -r/ ".; ~ v £ ':2.. ;2. D 0 R tJ 0 j f) r\ v C V11f i1t:rl' j:?(}!J1 J)l'~~ r>}) ADO T/ DA) XH- ( /'1- II ) or ) 'eO .".. I-l oZ 11 to 18 14 to 28 17 to 18 -7~;::-';:;' tI;-~- m (') -I /-}O-/.1I i •...l ';.) ' -I '. f../ VI VI l i: ... .'. .. If / ,,; ...... I ~ ~ I l-o) ..... o "0 D CD It TABLE C- ( CENTRAL OFFlfr TRUNK OPTIONS (Conti 'It m ... n CD STRAPS ON CENTRAL OFFICE TRUNK UNIT TERMINAL STRIP SLIDE 5 150·65746·01, CAD 61 OPTION FEATURE REQUIRED 556A Switchboard ZE Central Office Trunk Appearance at Cord Switchboard 608A or 608D Switchboard ZF CO Trunks 0 1 2 3 4 5 6 7 8 9 CO Trunks 0 1 2 3 4 5 6 7 8 9 FURNISHED REMOVE REQUIRED STRAPS ON SUPPLEMENTARY TRUNK UNIT J58829M LIST 51A & MI TSIAI TSI81 REMOVE STRAPS ON TRUNK CONN UNIT TERM. STRIP 150·65746·01 CAD 71 11 to 21 12 to 22 13 to 23 14 to 24 15 to 25 11 to 21 12 to 22 13 to 23 14 to 24 15 to 25 1---- 21 to 31 22 to 32 23 to 33 24 to 34 25 to 35 21 to 31 22 to 32 23 to 33 24 to 34 25 to 35 If provided, disconnect local cable lead from 1L of the R1 relay and connect to 1 of the CT relay. 6 z 'It U'I ... I ~. ~ ..... , ...o h) TABLE C- FEATURE CENTRAL OFFICE TRUNK OPTIONS (Cont) STRAPS ON CENTRAL OFFICE TRUNK UNIT TERMINAL STRIP SLIDE 5 ISD-65746-01, CAD 6) OPTION REQUIRED CO Trunks 6 and 7 Central Office Trunks 6 through 9 Single Digit Access to Toll CO Trunks 8 and 9 (Plug-In) Plug-In Central Office Trunks Hunting Emergency CO Conn Make-Busy and Busy Display Not Provided Make-Busy and Busy Display Provided Make-Busy and Busy Display Not· Provided Make-Busy and Busy Display Provided ZP(MD) YP YQ YS ZN(MD) 'V ~ -0 TSIAI TSIB) REMOVE STRAPS ON TRUNK CONN UNIT TERM. STRIP ISD-65746-01 CAD 71 24 to 28 11 to 18 11 to 18 J 14 to 28 14 to 28 11 to 24 24 to 28 11 to 18 11 to 18 14 to 28 14 to 28 YS 11 to 24 CO Trunk 3 16 to 17 CO Trunk 4 CO Trunk 8 17 to i8 26 to 27 CO Trunk 9 See Part 4 27 to 28 u; '"w See Part 6 Without Lockout Attendant -"~ With Secrecy Service Without Secrecy a REMOVE YP YQ -? With Lockout c.a FURNISHED REQUIRED STRAPS ON SUPPLEMENTARY TRUNK UNIT J58829M LIST 5 IA & MI With Restriction Without Restriction Z W 21 to 22 21 to 22 21 to 22 21 to 22 15 to 25 0 '"mQ 6 z VI VI ...... ""..... J ... I X Y 21 to 22 12 to 13 13 to 23 13 to 23 I to,) 0 III "0 m Q IQ l'il () .... <5 z TABLE C- CENTRAL OFFICE TRUNI< OPTIONS (Conn o FEATURE OPTION STRAPS ON CENTRAL OFFICE TRUNK UNIT TERMINAL STRIP SLIDE 5 (SD-65746-01, CAD 6) REQUIRED Camp-On Not Required WJ Indication of Camp-On YK Station Dial Transfer Required I FURNISHED I REMOVE REQUIRED STRAPS ON SUPPLEMENTARY TRUNK UNIT J58829M LIST 5 fA & M) 1----. TS(A) I TSm) REMOVE STRAPS ON TRUNK CONN UNIT TERM. STRIP (SD-65746-01 CAD 71 Prior to Issue 33D of the line, link, and marker circuit, when camp-on is not required, option WJ straps 2M of the COS relay to 6B of the NT relay. After Issue 33D of the line, link, and marker circuit, when camp-on is not required, option WJ straps 4M of relay COAA to 6B of the NT relay. When indication of camp-on is not required, remove YK option lead fr'om L of the CS relay to 2U of the IC9 relay. (Relays located in CO trunk unit.) ..When station dial transfer is required, remove green lead from 9 of the TT relay to 9M of the TT relay; remove green lead from 11 of the TT relay to 11M of the TT relay; and add a black lead from 9B of the TT relay to 5 of the TT relay. Notes: 1. Lockout service prevents attendant from reentering a central office connection except on a recall signal or before the called station answers. 2. Nonlockout allows the attendant to reenter incoming calls at all times, but the attendant cannot enter dial selected outgoing calls. This option is furnished with PBX. 3. When secrecy attendant'service is provided and the attendant reenters a call, the attendant can converse only with the called station. 4. Restricted attendant service prevents the attendant from making outgoing central office calls. 5. TrunJ,s must he in the same hunting group and strapping must include terminal 11 at the tnllll< hllnt terminal Rtrip. 6. LQckout may be provided without secrecy. but secrecy mllst not be provided without lockout. en en ..... ..... I .r:o. ~ I 100) ..... o ISS 3, SECTION 551-147-210 TABLE D - OPTIONS Al'PLlED AT RINGDOWN TIE TRUNK UNIT FEATURE Incoming Ringing Direct, through Repeating Coil or Through Bypassing Capacitors , Through Blocking Capacitors Code Ringing* .. OPTION CODE I STRAPS REQUIRED AT UNIT TERMINAL STRIP I Loop 2000 Ohms or More 11 to 21 22 to 32 X No Strapping Required Loop Under 2000 Ohms Loop 1500 Ohms or More W 11 to 21 12 to 22 21 to 31 Loop Under 1500 Ohms X 11 to 21 22 to 32 Required V 16 to 26 17 to 27 36 to 37 U 14 to 24 15 to 25 27 to 37 34 to 35 Trunk Equipped and Assigned as N oncode Ringing Trunk Y 23 to 33 Trunk Equipped and Unassigned Z 13 to 23 .. Not Required . When code ringing is not required, leads STT and STR should be disconnected at the house crossconnection terminals for the 100-pair cable from module 2 (SD-65746-01, CAD 1A) or at the prewired cable terminal section connector block D1 (SD-65746-01, CAD 33). 'therwise. it is reached by dialing a number in '~c 80 through 89 series. 9. DIAL REPEATING TIE TRUNKS Dial repeating tie trunks are assigned to the universal line circuits. Refer to Part 8 for service options applicable to universal line circuits. 9.01 Universal line circuits assigned to stations 20 through 29 or the answering end or a JA code call circuit may be arranged for the ':.me hunting and class-of-service options (restricted, :'JII allowed, toll denied, and unassigned) as other ;·,ations. (Refer to 2.02.) &.02 Universal line circuits assigned to circuits (code 8) other than station lines may be ,-~ranged for c1ass-of-service and trunk hunting ',ptions by strapping at TS-A. (See Fig. 8 and Table G.) When code 8 trunks are used, the dial '.ulse rcgi~tcr mu~t be wired for code 8 operation. When dial repeating tie trunks are provided, the dial pulse register must be wired for code 8 operation. (Refer to Table I.) 9.02 a,03 10. ·'.r:f'~r The PBX is furnished with six permanently wired 2-way central office trunks. Space is provided for four additional plug-in trunks. The trunks may be either central office or ringdown til' trunks. Tlw trunk ll)t'ations an' given in to Part l!l,) CENTRAL OFFICE TRUNKS 10.01 Tabll' I':. ~~4 Refer to Table I-I for straps required at the line, link, and marker circuit terminal strips. 10.02 To single-digit d.ial ~ for the long- distance operator, the tens digit :' i~ rt'~er\'ed for Page 11 ~P) SECTION 551-147-210 TABLE E- 259A TERMINAL STRIP TRUNK EOUIPMENT LOCATIONS SLIDE 5 NO. Permanent I 2~ .• :. TERV'," S~O MOUNTING PLATE TS 0 A, B B 1 C, D D 2 E, F F 5 M, N N 6 P, Q 7 R, 8 Q 8 0 2 0 :3 0 4 >. 0 0 " 0 KS-15724-L2 DIODES 0 5 0 6 .. ~. ST I I 0 0 ~ SD- H 4 G, H K, L' 8 T, U U 9 W, X X 3 Plug In L 0 7 0 0 B 0 I 0 SUPPLEMENTARY TRUNK UNIT FOR CO TRUNK APPEARANCE AT SWITCHBOARD Located external to PBX Trk 0 through 4 Trk 5 through 9 Fig. 7-Typical Diode Connections for Sin9"~': Dialing (Stations 30 and 60) Plug-in trunks may be either central office or ringdown tie trunks. Note: TABLE F - long distance and has access to central office trunks in positions 6, 7, 8, and 9 only. Options for trunks are provided by placing straps on the central office trunk terminal strip located as shown in Table E and the central office trunk hunting terminal strip (CO TRK HUNT) located in slide,,4, position Z. (See Fig. 6 and 9 and Table C.) , . \. ')i \. KEY AND LAMP CONNECTION5 ':r STATIONS ARRANGED FOP. Si~;C,,: DIGIT ACCESS CONNECT 1OO-PAIR DSS AND SINGLE· DIGIT DIALING TERMINAL" ISb-65746-01, CAD 24! 10.03 ~ ,-' TERM. NO. FOR STATIO'; KEY lAMF PCHG PCHG 1 2 lEAD 2 81 8 1T 3T 21T 1R 3R 21R 3 4 6 iI - L BAT. 2T 1T 22T 5 11. -- TO L GRD 2R 4R 22R I '\ S I 6 '7 ~;rr ;11 1 ,f3T ~;~l~ , Iii: 43R ~IT 'I:'::. 4~ T' ~.m II ," 441<~l,_~ BUSY VERIFICATION * If prc"v'irerl cable tcrminal section i~ ;': An optional busy verification auxiliary trunk circuit may be provided to permit the attendant to establish a monitoring connection to any busy, or busy and camped-on station, and a talking connection to any idle station. The busy verification auxiliary trunk unit is installed on a plug-in basis and is auxiliary-to-attendant trunk 2. Refer to Section 551-144-210 for installation procedures. 11.01 Page 12 S, 81, L- BAT, and L- GRD leads ::1'" at D3 connector block. 12. 12.01 I," ATTENDANT TRUNKS The PBX is furnished with thr l l ' : , " trunk units located in slidl' ii, : ' y ISS 3, SECTION 551-147-210 (SO) (24) .-, (CAD 16) ..-J 0 0 0 0 BAT-T :J 0 0 0 0 COT D_~O 0 0 GRD-T dffiJ-"U~ d .--, .....; 0 n LC rrCl-t';'1 ~==== = = =:::-, ~ ~ ~ n ,...., '-' n 0 0 0 RTT 0 CS '9~l '0 0 TTLA 14. 0 TTLD (SO) TS-A ~ .. ~ ,:,VPLES: :P~~K SO RESTRICTED - PU~K SI TOLL ALLOWED lPU.~K 83 TOLL DENIED TOU"K 83 HUNTS TO STATION SO 'PUNKS 83 AND 80 STRAPPED FOR ONE - DIRECTION HUNTING -:;U~KS 81 AND S2 STRAPPED FOR TWO-DIRECTION HUNTING Fig. 8- Typical Strapping on TS-A Terminal Strip for Code 8 Class-of-Service and Trunk Hunting Options (50-65746, CAD 16) On an incoming trunk call, there are visual and audible signals at the PBX attendant console. The call is picked up by pressing the corresponding trunk key. The attendant then operates the hold key and dials the requested station line number or operates the proper direct station selection key and the trunk is automatically connected. If the 'station line is busy, the trunk camps on the line and indicates by a momentary signal to the busy party that another central office trunk is waiting. This signal is transmitted to the busy line after the calling party has camped on and the attendant has released. The camped-on trunk will cut through as soon as the line is idle. Subsequent calls from other trunks to the busy line will not camp on until the first camped-on trunk has cut through. 14.02 I.. and AA. INDICATION OF CAMP-ON 14.01 ·S·A IS LOCATED AT SLIDE 2, POSITION NOR P OR AT SLIDE 3, POSITION V. I Applicable class-of-service options which may be provided by strapping at the dial pulse register are shown in Table 1. 13.04 H 0 0 provides one hunting group for trunks 0 through 9. When trunks 3, 4, 8, and 9 are assigned, straps must be removed at the trunk connector unit terminal strip. If trunks 3, 4, 8, and 9 are ringdown tie trunks, the tie trunks must be arranged in one hunting group. (See Fig. 5 and Table K.) Refer to Table C for applicable service option. These units are wired for operation 0;: the PBX with a cordless attendant position or r"~r1 switchboard. 15. Refer to Table J for strapping required when the PBX is to be operated without ',~ attendant. The PBX is furnished with two dial pulse registers located in mounting plate spaces A to C and D to F in slide 6. 12.02 13. 13,01 RINGDOWN TIE TRUNKS Ringdown tie trunks are located at slide r> in space which may be used for either r·i.tral office trunks 3, 4, 8, and 9 or ringdown tie '~'::1ks. (Refer to Table E.) Tie trunk options which may be provided at the terminal strip on the trunk unit are <I'd in Tahle D. 13.02 13.03 The CO TRK HUNT terminal strip is wired for unequipped trunks 3, 4, 8, and 9 and DIAL PULSE REGISTERS 15.01 The dial pulse register must be. arranged, by means of strapping on the dial pulse register terminal strip (DP REG 0 and DP REG 1), to receive originating c1ass-of-service and/or class-of-call information as shown in Table 1. 15.02 16. CENTRAL OFFICE ALARM If the PBX alarms are to be extended to the central office, strapping must be placed on the terminal strip on the fuse panel alarm and register unit located in slide 1. position X. 16.01 Page 13 SECTION 551-147-210 TABLE G - CLASS-OF-SERVICE OPTIONS FOR CODE 8 CIRCUITS 150-65746-01, CAD 16) I OPTIONS Toll Allowed Denied Restricted STRAPS REOUIRED AT TS-A I~OTE 1l NOTES CS to TTLA CS to TTLD 2 CS to RTT 4 I l 3 Notes: 1. TS-A is located on tie trunk adapter unit at slide 2, mounting plate position N or P. 2. Toll allowed trunks can dial all calls. 3. Toll denied trunk can dial intracentral office and extended area central office calls but not toll calls. 4. When establishing a 'connection from a restricted code 8 tie trunk to a central office trunk, the attendant cannot use the dial back feature. Instead, the restricted code 8 tie trunk must be asked by the attendant to go on-hook to be called back later on a central office or ringdown tie trunk to code 8 tie trunk connection basis. (a) To arrange the alarm circuit to function with a marginal alarm system at the central office, strap terminal 47 to terminal 48 (Z option). (b) To arrange the alarm circuit to function with reverse battery alarm system at the central office, strap terminal 37 to terminal 38 (Y option). (c) To arrange the alarm circuit to function with reverse battery alarm systems at the central office, connect FA GND to terminal 38 and connect FA BAT to terminal 18 (A option) when external traffic registers are provided. 17. NIGHT CONNECTIONS 17.01 Two arrangements to provide night connections for the 7G6A PBX have been provided. Fixed Night Connections (Manufacture Discontinued): This arrangement provided for the transfer of four trunks to stations 30, 31, 32, and 33. These are the same stations used for emergency transfer. (Refer to Part 6.) This arrangement can be modified locally in accordance with circuit drawing to provide flexible night connections. (a) Page 14 (b) Flexible Night Connections: This arran~rm·" permits the attendant to establish nir:' connections between any central office tr;::' and any station. 18. TRUNK ANSWER FROM ANY STATION The auxiliary positron circuit for rrp:' trunk answering permits any PBX st:\: to answer any incoming central office trunk ',' This feature is activated by removing the hl':': at consoles and/or operating the remote anS\\'l'r " at the 6-button key telephone set when pm',,:,; An incoming central office call to the PBX act;'., a visual and/or audible signal. Anyone a\\';i~' the signal may go to the nearest idle PBX ~:: .. set and dial the trunk answering code. Tbi~ a" retires the audible and/or visual signal and c()n~' the PBX station and the incoming central I': trunk. The PBX station can then tran~frr . call once to another PBX st~ltion. 18.01 The remote trunk answering eirel: i: one of the universal line circuit~, station line capacity of the PBX is reduccd !':' when the remote trunk answering circuit is pw. Refer to Part 8 for serviee options applil':t" universal line circuits. 18.02 ISS 3, SECTION 551.147.210 TABLE H - UNiVERSAL tiNE CIRCUIT OPTIONS (5D-65746-01, CAD 16) OPTIONAL STRAPS APPLIED ON TERMINAL STRIPS ON TIE TRUNK ADAPTER AND STATION LINE UNIT ON SLIDE 2 OPTION FEATU~E -:,,::on TERM. STRIP FURNISHED STRAPS REQUIRED STRAPS M TS (Line) S to SlA S to SlA ZD TS (C) T1 to T1-1 R1 to R1-1 T1 to T1-1 R1 to R1-1 TS (B) T to T1-1 R to R1-1 T to T1-1 R to R1-1 TS (Line) CS to TLA .;~{. Class of Service Toll Allow('d Toll Denied TS (Line) CS to TLA CS to TLD CS to TLA CS to TLA TS (Line) CS to TLA None TS (C) T1 to T1-1 R1 to R1-1 T1 to T1-1 R1 to R1-1 ZF TS (D) ";"::In'k T to T1-1 R to R1-1 ZD TS (C) Tl to T1-1 R1 to R1-1 ZF TS (D) Make-Busy and Busy Display Not Provided WP Make-Busy and Busy Display Provided Class of Service .. A~t"'ndant ("Inference T to Tl-1 R to R1-1 TS (Line) HM to HM-2 T1 to T1-1 R1 to R1-1 T to T1-1 R to R1-1 HM to HM-2 TS (D) HM-2 to MB2 i TS (Line) TS (D) Toll Allowed TA TS (A) CS to TTLA Toll Denied TD TS (A) CS to TTLD Restricted RS TS (A) Port 5 XC TS (B) Ports 1 through 5 ZD TS (C) XC TS (A) - i HM to HM-2 CS to RTT I r I TS (B) T to T1-1 R to R1-1 HM-1 to HM-2 1T-1 to 1T-2 TS (B) TS (D) I HM to MB1 WQ -- :·w:!v '~:.' '[runk HM-1 to HM-2 1T-1 to 1T-2 TS (B) -::,W:lV Tie CS to TLA ZD Restricted -l"~"rhone n:I'~ation I I - ~,--_. -- '>-'orrlcd REMOVE STRAPS T1 to T1-1 R1 to R1-1 Tl to Tl-1 Rl to Rl-l I R to Rl-l T to Tl-l R2 to Tl-1 T2 to R1-1 82 to Sl I CS to COT ! R to Rl-1 ! T to Tl-1 Page 15 SECTiON 551-147-2 i 0 TABLE H - UNIVERSAL LINE CIRCUIT OPTIONS ICont) ISD-65746-01, CAD 16) I FEATURE OPTIONAL STRAPS APPLIED ON TERMINAL STRIPS ON TIE TRUNK ADAPTER AND STATION LINE UNIT ON SLIDE 2 OPTION FURNISHED STRAPS TERM, STRIP I Conference Callinf:' I Port 0 ZF ! Ports 0 throug'h 5 ZD • u Port 5 Meet-Me Conference (A&M) TS (D) I TS (C) I TS (B) N ZD TS (Line) TS (C) T1 to Tl-1 Rl to Rl-I T to TI-l R to Rl-I Tl to 1'1-1 Rl ttl R ,-, TS (B) Intel'fnce '1'1'11 Ilk Calling End ZD TS (C) _.- \ •i 1'1'\11(. ZG Til (I j J - i I , i -, l' to Tl·1 R to RI-I TS (A) TS (B) ! REMOVE STRAPS HM-l to HM-2 IT-I to IT-2 TI to Tl-1 RI to RI-I TI to TI-I Rl to RI-l T to Tl-1 R to RI-l ._------_ . XD REQUIRED STRAPS II .. ; CS to COT R2 to Tl-l T2 to Rl-1 S2 to SI HM to 11' Tl to 1'1-1. Rl to Rl-! ; , I I . ! T to T1-1 -- - -R- -to- RI-I '1'1 to '1'1-1 ""_._.--. PI tt_, .. -- J I L' .-. nt 1 ., ., /I it,,.... , ...l U .. (; i ,'(; u j t tv HM-3 of ar,swering end 1i ne ci rcu i t 1T -1 of calling end line circuit to IT-2 of answering end line circuit. HM-3 of anend swering line circuit to HM-2 of calling end line IT-2 circuit; of answering end line circuit to IT-l of calling end line circuit. S2 of answering end line circuit to S2 of calling end line circuit. Tl to 1'1-1 RI to RI-l HM to IT TI to Tl-l RI to Rl-l HM-2 of calling end line circuit to HM-3 of anend swering line circuit 11'-1 of calling end line circuit to IT-2 of answering end line circuit. ,l'; Answering End ZE 1'8 (D) I 1'8 (B) Without Answering Feature Code Call Calling End ZD 1'8 (C) N ZD T8 (Line) 1'8 (C) ZG 1'8 (D) Tl to 1'1-1 Rl to Rl-l TI to TI-I Rl to Rl-l , i 1 i Page 16 I .. ~ ISS 3, SECTION 551-147-210 TABLE H - UNIVERSAL LINE CIRCUlT OPTIONS (Contl (50.65746-01, CAD 16) I OPTIONAL STRAPS APPLIED ON TERMINH STRIPS ON TIE TRUNK ADAPTER AND STATION LINE UNIT ON SLIDE 2 I I FEATURE I I Answering I End ('pdll Call I i I I i OPTION , I ZE I FURNISHED STRAPS REQUIRED STRAPS T8 (D) I 82 of answer- I ing end line circuit to 82 of calling end line circuit. T8 (B) i , i I .. , Loud- ZD TS (C) ZS T8 (D) TI to TI-I RI to RI-I ~pl'aker : I'ag-ing TI to TI-I RI to RI-I HM-I to HM-2 IT-I to IT-2 I , . : , Auxiliary I I ZD Circuit (Ill' Remote Trunk Answering \9. ZF TS (B) T to TI-I R to RI-I TS (C) TI to TI-I RI to RI-I ,,/ Position "". TS (D) T to Tl-I R to RI-I .. TI to TI-I RI to RI-I HM-I to HM-2 IT-I to IT-2 T8 (B) TRAFFIC AND TROUBLj: REGISTERS REMOVE STRAPS HM-3 of answeringend line circuit to HM-2 of calling- end line circuit; IT-2 of answering- end line circuit to IT-I of calling end line drI cuit. I I , TERM. STRIP T to TI-I R to RI-I T to Tl-I R to RI·I terminal strip located in slide 1, position X. Fig. 11.) (See The PBX is furnished with six registers located in slide 1 to be cross-connected as :·ii.ir~'d to record traffic or troubles. 20. 1~02 Requirements for placing the J86464 power plant in service are covered in Section 167-480-301. 19,01 POWER PLANT 20.01 The registers may be cross-connected by placing straps between terminals on register ,~i:linal strip located in slide 1, position X. (See :',: 10.) External traffic registers may be provided on an optional basis in a cabinet located 'or the PBX attendant. When used in conjunction ;,,:r: kn external traffic registers, the six internal ..:;,':l'r:; may be used to record the same data or ., :;:i\)nal data, or they may be temporarily removed 'i:; the circuit. Caution: Follow the procedures in the order covered in this section. The power plant interrupter is shipped without oil in the gear train and must be filled with oil before operation. :9,03 1~ 04 The registers may be cross-connected by placing straps between terminals on register 21. CONF~RENCE CALLING The station controlled circuit allows any station to set up a conference connection with any five stations or with any four stations and one central office trunk. A private consultation 21.01 Page 17 SECTION 551-147-210 icaturl' l~ pro\'idl'd whidl permit:-i the orii,;inating station to conicr privatl'ly with each new conferee prior to both jllining- the conference bus, Stations can be added without attendant assistance; however, attendant assistance is required for the addition of a central office trunk. The conference circuit requires the use of universal line circuits. The assignment of universal line circuits is made locally; however, if no terminals are specified, preferred terminals are 84 through 89. 21.02 A 446F diode designated SCC, provided with J58829H, List Q, must be mounted to the OT- relay of the trunk circuit assigned to port 5 of the conference circuit. OT29 relay on slide 2, position 2P is preferred; however, any of the OT relays may be assigned locally. Install SCC diode in accordance with local instructions and SD-65741-01. 21.03 22. MEET-ME CONFERENCE (A&M) The meet-me conference circuit provides a means for setting up a conference connection with five stations or four stations and one trunk. It is possible to connect two trunks to the conference; however. this is not recommended because of resulting transmission difficulties. however, if no terminals are specified, preferr",; terminals are 85 through 89. An optional attendant lockout feature :. available to provide for lockout of t~", attendant from the conference control circuit af:<,~ the attendant releases. The attendant may I,. recalled to the conference by a switch hook 'ih:,at one of the stations in the conference. To provi,:" this feature, remove straps between pins 6 and 1,. and between pins 7 and 11 on the conference l:r,:: CI connector at slide 2. 23.03 23.04 24. Refer to Part 8 for service options applicab;" to the universal line circuits. CODE CALL Two universal line circuits are required :., connect to one channel of the code c::.:, circuit, one for the calling end and one for tr,., answering end. Refer to Part 8 for universal li~,,: circuit options. 24.01 22.01 The conference circuit requires use of universal line circuits. The assignment of trunk terminals to universal line circuits is made locally; however, if no terminals are specified, preferred terminals are 80 through 84 or 85 through 89. 22.02 Refer to Part 8 for service options applicable to the universal line circuits. 22.03 The winding of L(20-29) relay associak; with the line circuit assigned to the answeri~: end of the 3A code call circuit must be disconnec:.,·: by placing a 550B tool in the IB and 2B, 4 a~.: 5, and IT and 2T, or 2 and 3, contacts of t~, associated LHM(20-29) relay off-normal springs, 24.02 25. TOUCH-TONE& CALLING TOUCH-TONE calling allows a PBX attenc~:~ or station to call number,S by a TOUCH·TO\'; dial m place of a rotary dial. 25.01 26. RECORDED TELEPHONE DICTATION The recorded telephone dictation tr:.::, provides a means for connecting the ?:' to a customer provided dictation machine ar.~ :" . translating dial pulses from the PBX for the ;':.:~: of controlling the dictation machine. 26.01 23. ATTENDANT CONFERENCE The attendant controlled dial conference circuit allows the attendant to set up a conference connection with any five stations or tie trunks or with any four stations or tie trunks and one central office trunk. 23.01 The attendant controlled dial conference circuit requires the use of universal line circuits arranged as trunks. The assignment of universal line circuit terminals is made locally; 23.02 Page 18 Each dictation trunk uses one of ::-: :..~ line circuits. The number of ::'--. may be provided is limited by the r.:.:~ universal line circuits available. The sta:: . capacity of the PBX is reduced by one ;l~ , dictation trunk provided. Refer to P:;;'t . service options applicable to universal line c:: 26.02 TABLE 1 - DIAL PULSE REGISTERS 0 AND 1 (50-65746-01, CAD 51 SLIDE 6 POSITION A THROUGH F OPT